No no no no no no no no no
Answer:
P = 20 cm
Step-by-step explanation:
The appropriate formula is P = 2W + 2L.
Here that comes to P = 2(6 cm) + 2(4 cm) = 20 cm
Answer:
413
Step-by-step explanation:
Answer:
x = 10
Step-by-step explanation:
3x - 9 = 21
add 9 on both sides:
⇒ 3x - 9 + 9 = 21 + 9
⇒ 3x = 30
divide 3 on both sides:
⇒ 
⇒ x = 10
to check answer, substitute x by 10 on the original equation:
⇒ 3x - 9 = 21
⇒ 3 x 10 - 9 = 21
⇒30 - 9 = 21
⇒ 21 = 21
Answer:
Step-by-step explanation:
You can see the angle opposite to (10x-15) is equal because it is a corresponding angle (learn about them or ask)
The corresponding angle of 10x-15 is 90
so
10x-15=90
now this is simple algebra
10x=90+15
10x=105
x=105/10
x=10.5
